#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sched.h>
#include <string.h>

static volatile bool stop;

static void alarm_handler(int sig)
{
	printf("Woof woof!\n");
	stop = true;
}

int main(void) {
	struct sched_param sp;
	int ret;

	memset(&sp, 0, sizeof(sp));
	sp.sched_priority = 12;
	ret = sched_setscheduler(0, SCHED_FIFO, &sp);
	if (ret != 0) {
		printf("Error setting scheduler\n");
		return -1;
	}

	if (signal(SIGALRM, alarm_handler) == SIG_ERR) {
		printf("\ncan't catch SIGINT\n");
		return -1;
	}

	alarm(5);
	while (!stop) {}

	return 0;
}